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Finding the Fourth Proportional to 36,855.40, 55,291.20 and 11,891.20

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Solution

The fourth proportional to 36,855.40, 55,291.20 and 11,891.20 is: 17,839.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    36,855.40 : 55,291.20 = 11,891.20 : x
  2. Step 2: Convert to fraction form
    36,855.40/55,291.20 = 11,891.20/x
  3. Step 3: Cross multiply
    36,855.40x = 55,291.20 × 11,891.20
  4. Step 4: Simplify right side
    36,855.40x = 657,478,717.44
  5. Step 5: Solve for x
    x = 657,478,717.44/36,855.40
  6. Step 6: Final answer
    x = 17,839.41

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.